martin



1. s. MARTIN. MAGNEIO ATTACHMENT. APPLICATION FILED JAN-16.1915.

Patented Oct. 7, 1919.

5 2 SHEETS-SHEET 1.

A TTOR/VEYS J. S. MARTIN.

MAGNETO ATTACHMENT. APPLICAHON man JAN. 16. 1915.

1,318,218. Patnted Oct. 7,1919.

(y 65]?? 4 ZSMETS-SHEET 2.

wr l8 INVENTOR WITNESSES John 5. Marhfl 4 TTOR/VEYS UNITED STATES PATENT 301m SAMU EL MARTIN, 0F ATLANTIC CITY, NEW JERSEY, ASSIGN 01" TO SYLZTIQOPJ? ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY.

MAGNETO ATTACHMENT.

To all whom-it may concern Be it known that I, JOHN S. MARTIN, a citizen of the United'states, and a resident of Atlantic City, in the county of Atlantic and State of New Jersey, have invented a new and Improved Magneto Attachment, of which the following is a full, clear, and exact description.

My invention relatesto attachments for high-tension magnetos of internal-combustion engines whereby to the shaft of the magneto can be given an accelerated movement while the engine is started, thereby creating a spark substantially equal to the spark created during the normal running speed of the engine shaft.

An object of the invention is to provide an attachment of the class described which is simple, strong, and inexpensive, which has no binding screws,and in which all the parts are so inclosed that none can get out'of order, and consequently for which attachment very little attention is necessary. A further ob]ect of the invention is to provide an attachment of the class described in which normally the magneto shaft is unyieldingly coupled to the mechanism driving it so that no lagging of the magneto shaft can take place at high speed of the engine. A still furtherobject of the invention is to provide an attachment of the class described which will automatically become inoperative as the spark control of the magneto is ad vanced.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangen'ient of parts as herein fully described, illustrated and claimed. In the accompanying drawings, forming part of the application, similar characters of reference indicate corresponding parts in all the views, and

Figure l is a side elevation of a magneto provided with my attachment;

Fig. 2 is a front elevation of my attachment on the magneto;

Fig. is an axial section therethrough on line 33, Fig. 4:;

Fig. 4: is a vertical section on line 14, Fig.3;

Fig. 5 is a horizontal, axial section on. line 5-5, Fig. 4;

Specification of Letters Patent.

driven members.

Application filed January is, 1915. Serial No. 2,625.

I Fig. 6 is the inside elevation of a driving member; 1' Fig. 7 is a side elevation of the attachment alone it appears on the shaft of the magneto; and Fig. 8 is a perspective vi which normally couples the d in and the l a sf the key tion preferably forming an integral part of the driven member. Contacting with the front of the driven member is a driving member 13 .in the shape of a disk centrally apertured. The aperture engages a reduced portion 14: at the front of the driven member vhereon said driving member is to turn and is maintained concentric a the drlven member.

erably a coil spring, one end of which gages the lug 15.

The lateral surface of the driven member 10 is preferably depressed so that marginal flange 17 is formed at the rear end of the driven member. The sait de-- pressed lateral surface of the driven member has keyways 18 running parallel to the axis of the driven member and which are diametrically opposite. Mounted to slide in each keyway is a key 19, preferably rectangular in cross section, having an integral pin 20 projecting laterally therefrom above the depressed lateral surface. The member 13 has also diametrically opposite angular apertures 21 Which will snugly enbridge 12 and the other the gage the corresponding keys 19 when said and that of the disk; that is to say, the

lateral surfaces of the disk, ring and flange 17 are flush. The ring 22 hashelically disposed slots 23 each -oi which is in engagement with a corresponding pin 20 of the key 19. By turning this rlngor by arresting the movement or the ring while turning the driven member, the keys 19 can be moved in and out of engagement with the driving member 13. The said ring 22 has on the inner surface thereof alug or abutment which engages an elongated, arcuated, peripheral slot 25 provided. on the depressed lateral surface of the driven member. This slot receives a resilient member 26 in the shape of a coil spring, one end of which abuts against one end oi slot 25, while the other end of the spring abuts against.

the abutment 2 1'. Normally the spring 28 maintains the ring 22 in the position shown inliig. 7, that is, it forces the keys 19 into engagement with the rectangular openings in the disk or driving member 13. To withdraw the keys from engagement with the driving member, that is, to uncouple the f ving and 'driven members, the ring and pin must be displaced relatively, so as to bring the pins to the opposite ends of the slots, as shown in Fig. 7'. The lateral displacement of the ring 22 on the driven memher is prevented by the disk or driving member 13, which is, in turn, prevented from any lateral displacement by a washer and nut attached to the end of the magneto sha'lih 9 projecting out of the driven member.

Normally the driving and driven members are coupled together-by the keys 19, and the coupling is unyielding that is, the driven member cannot lag behind the driving memher no matter what the speed of the driven member is. As shown in the drawing, the

driving member is provided with driving pins 27 whereby'tlie same is connected to the driving shaft which is actuated by the engine shaft. But it is self-evident that the driv ng member 13 can be coupled in any suitable way to the driving shaft, actuated by the engine shaft. When the engine is to be started, by means of my attachment the driving and driven -members are uncoupled by means of a pawl 22 which is mounted to engage one of the projections 29 provided on the lateral surfaces of the ring.

The pawl 28 is preferably mounted to turn freely on a shaft 30 extending longi- 'tudinally of the magneto and bearing in lugs associated therewith. A spring 31 normally forces the pawl 28 toward the lateral surface of the attachment. The end of the shaft, ad acent the pawl, carries an arm 32 rigidly connected with the shaft and provided with a pin 33 adapted to engage the pawl when the arm is moved ,tgward the pawl. The otherend of the shaft 30 has a rigidly attached arm 34 which is connected member l3 will turn the driven member whilethc ring 22 arrested in its movement, causing the keys 19 to move out of engagement with the disk, thus unlocking the driving and driven members. A farther movement of the driven member will be prevented by the pins 20 of the keys as the pins reach the other, end of the helically disposed slots 23. Thus, the movement of the magneto shaft 9 will be arrested, while the driving member 13 will continue to rotate and the parting between the lug 15 and the bridge 12 will take place, causing a compression of the spring '16 withinthe annular slot ll of the driven member 10. give an accelerated movement to the shatter the magneto, the pawl 28 is disengaged from the stop 29 of the ring 22, thus permitting the expansion of the coil spring 16 which will force the driven member 10 and the magneto shaft 9 attached thereto to overtake the driven member by forcin the bridge portion. toward the lug 15. t is self-evident that the speed with which the driven member 10 and the shaft 9, will rotate will depend on the compression given to the coil spring 16.

The pawl 28 is disengaged from the pro-. jection 29 of the ring by cam portions or bosses 38 formed on the edge hi the disk, which cam portions are preferably in normal position of the attachment at right to the projections 29, so that the driving member will be forced substantially a quarter of a revolution ahead of the driven member before the same is released to overtake the driving member under the action of the spring 16. Durin the movement oi the pin 20 within this s 0t 23, when the keys are withdrawn from engagement the disks, that is, when the driving and driven members are uncoupled, the spring 28 will be compressedand remain so compressed until the expansion of the spring 16, which will bring in alinement the corresponding rectangular openings of the disl; with, the keyways 18 of the driven member, when the said spring will bev free to expand and, consequently, cause the ring to move relatively to the driven member, and thus force the keys into engagement with the driving member and lock the same to the driven member. As soon as the sparksleeve control 37 is made to advance the prevent the pawl 28 from engaging the rin 22, consequently leaving the driving an driven members positively locked after the engine has started and the same continues to Work. .The' provision of the shaft 30 withits' arms and its connection with the sleeve 37 prevents a person from starting the engine with an' advance spark, and, consequently, prevents the back fire of the engine in cranking or in starting the same. The pawl 28 isalso provided with a pin 39 engaged in a slot 40 of a rod 41;"loy means of which rod the pawl can be moved away from my attachment independently of the actuation of the sleeve 37..

From the above description and the'draw ings it will be noted that all parts of the attachment are so located that none of them can become lost or separated from either the driving memberor the driven member. As,

for example, the keys are maintained in position in their keyway by the ring and the ring is prevented from lateral movement by the nut and washer which maintain the driving member on the driven member. The abutment 2 is also prevented from displacement by the ring, and the same is placed into its groove by a cut-out 42 leading to the slot 25, to permit the placing of said abutment thereinto. If desired, the device can be packed with grease. Very little attention will have to be paid to the same, as there are no parts which can, get out of order or become loose.

From the foregoing description, taken in connection with the accompanying drawings, the advantage of the construction and operation of the attachment shownwill be readily understood'by those skilled in the art to which the invention pertains; and while I have described the principle of 0 eration,- together with the attachment w ich I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made as are within the scope of the appended claims.

Having thus described my invention, I

- claimasnew and desire to secure by Letters Patent;

' 1. In a magneto attachment, a driving member; a driven'member; means normally flocking said driving and driven members; .means for. unlocking the driven member from the driving member and arresting the movement of-the same, whereby the drivlng vmember will run ahead of the driven member, said driving member having means for releasing said driven member after the same hasbeen displaced through a'predetermined distance; means for forcing the driven member to overtake the driving member; and means for automatically locking the two when the driven member'has overtaken the driving member.

2. In a magneto attachment, a driving member; a driven member; means normally locking the two members; means for unlocking the driven member from the driving member and arresting its movement while the driving member is free to turn; means for releasing said driven member after a predetermined displacement of the driving member; and means for causing the driven member to overtake the drlvin member when the same is released, said locking means automatically coupling the two members when the driven member overtakes th'e drlving member.

3. In a magneto attachment, a driving pling means unyield'ingly connecting the driving member and the driven member;

means for uncoupling the driven member whereby said coupling means automatically connects unyielchbly the driving member and the driven member.

'80 member; a driven member; automatic cou- 4min a magneto attachment, a driving I member; a driven member; automatic coupling means unyieldably connecting the two members; means for uncoupling the driven member. and arresting its movement; means member; and resilient means for causing the driven member to overtake the driving member when the same is released, whereby the coupling means automatically locks the driven member to the driving member.

5'. In a magneto attachment, a driving member; a driven member; automatic coupling means unyieldably connecting the driving member and the driven member; means for uncoupling the driven member from the driving member and arresting its movei'nent; means for releasing said driven ,member for releasing said driven member after a predetermined displacement of the driving after a predctern'iined displacement of the v driving member and controllable by said driving member; and a spring for causing the driven member to overtake the driving member when the same is released, whereby the coupling means automatically locks the driven member to the driving member.

6. In a magneto attachment, a driving member; a driven member; automatic couplinr; means unyieldably connecting the driving member and the driven member;

means for uncoupling the driven member from the driving member; means for arrest ing the movement of the-driven member after it has been uncoupled, said driving member having means for releasing said driven member after a-predetermined, displacement of the driving member and' a c'oil spring asso- V displacement of the driving member;

ciated with the driving member and the driven member adapted to force the driven member to overtake the driving mem' ber after .the release of same, said coupling means adapted to, automatically establish unyielding connection between the driving member and the driven member when the driven member overtakes the driving mem ber.

7. In a magneto attachment, a driving member; a driven member; automatic coupling means unyieldably connecting the drivmg member and the driven member; means for uncoupling the driven member from the driving member; means controlling the uncoupling means adapted to arrest the movement of the driven member; means associated with the driving member for operating said means controlling the uncoupling means, whereby the driven member is released after. a predetermined displacement of the driving member; and a coil spring associated with the driving and the-driven members adapted to force the driven memberto overtake the driving member after the same has been released, said coupling means automatically establishing the unyielding connection between the driven member and the driving member-when the driven member overtakes the driving member;

8. In combination with a magneto having a sparkcontrol, an attachment comprising a driven member rigidly connected to the magneto shaft; a driving member; automatic coupling means unyieldingly connecting the driving and driven members; means for uncoupling the driven member from the driv ing member and arresting its movement, said means being operated from the spark control of the magneto; means for releasiig said driven member after a predetermin d an resllient means for forcing the driven member to overtake the driving mem'ber after the same has been released, whereby the coupling means will automatically and unyieldingly connect the driven member to the driving member.

9. In a magneto attachment, a driven member having an annular recess at one side thereof, said member having aportion bridging said annular "recess; a driving member mounted to rotate on said driven member and having a lug projecting into said recess; a coil spring within said recess having one. end thereof engaging the bridge portion and the other end, the lug of said driving member, whereby the lug normally contacts with the bridgingiportion; a key slidably mountedin said driven member and ada ted to engage the driving member when the lug and bri ge contact; a ring mounted to turn on said driven member but prevented from lateral movement thereon, said ing the movement of the ring While the driving icmber is turned, whereby the key is withc rawn from engagement with the driving member, thereby permitting a relative movei-nent' between the driving and the driven members, thus causing a compression of the coil spring within the recess of the driven member, said driving member having means for engaging the means arresting the movement of the ring after a predetermined displacement of said driving member, where by the compressed spring within the recess of the driven member causes the same to overtake the driving member by bringing the bridging portion against the lug of the driving member; andmeans associated with the ring for restoring the same to its normal position on the driven member, whereby the key is forced into engagement with the driving member.

10. In combination, a magneto having a spark control; means for driving the magneto; means coupling the magneto and drive; means controlling the coupling means, and in turn controlled by the spark pling means associated with the spark con trol of the magneto and adapted to become operative when the, spark control is completely retarded.

12. In combination, a magneto having a spark control; driving means therefor; meanslocking the magneto to the drive; means'for unlockin the-magneto from the drive controllable $10111 the spark control of the magneto; and means for automatically locking the drive and the magneto after the same has been unlocked controllable from the drive, substantially as for the purpose set forth.

13. In a magneto attachment, a driving member; a driven member; means normally inoperative for ieldingly connectin the driving and the driven members whereby the driving member may be run ahead of the driven member; automatic coupling means unyieldingly connecting the two members normally; means for uncoupling the driven member from the driving member and for arresting the movement of the driven member, whereby the yielding connection becomes operative; and means for releasing ing and the driven members unyieldingly.

14. In a magneto attachment, a driving member; a driven member ,"yielding means CIE between said driving and driven members the driven member from the driving mem-- .ber and arresting the movement of the driven member, whereby the yielding means becomes operative; and means for releasing said driven member after a predetermined displacement of the driving member, Whereby the yielding means causes the driven member to overtake the driving member, and when the same has overtakenthe driving member the coupling means automatically connect the driven member and the driving member unyieldingly, rendering the yielding connection normally inoperative.

15; In .a magneto attachment, a dr;iven member having an annular recess at one side thereof; a portion bridging said annular recess; a drivin. jecting into said recess; a coil spring within said recess having one end thereofengaging I the bridging portion and the other end, the

lug, whereby a yielding connection between the driving member and the driven member is formed; means normally locking the driving member and the driven member whereby the yielding connection is normally inoperative; means for unlocking the driven member from the driving member and arresting the movemenfio r the driven member, whereby the coil spring is compressed; means for releas'm the driven member controlledby the drivmg member whereby the coil spring causes the driven member to overtake the driving member; and means for automatically locking the driving member to the driven member when the same is overtaken.

16. In a magneto attachment, a driven member having an annular recess at one side thereof; a portion bridging said annular redriven member to the driving member when the coil spring has brought the bridging porcess; a driving member having a log projecting into said recess; a coil spring within said recess normally maintaining the lug against the bridging portion; means locking the driving and driven members, whereby the coil spring is normally inoperative; means, for unlocking the driven member from the driving member and arresting themovement of the driven member, whereby the coil spring is cpmpressed and said lug is parted from the bridging portion, said driving member having means for releasing said driven member after a predetermined relative displacement of said driving member, whereby the coil will force the driven member to overtake the driving member by bringing the bridging portion against the lug; and resilient means associated with the driven member for automatically locking the tion in contact with the lug of the driving member. a

memberhaving a lug pro- 17. In a magneto attachment, a driven member having an annular recess at one side thereof; a portion bridgin said annular recess; a driving member having a big engaging said recess; a coil spring Within said recess maintaining the lug against the bridging portion; keys slidably mounted in said driven member, said driving member having means adapted to engage the keys whereby the same is locked to the driven member; a ring mounted to turn on the driven member to prevent from lateral displacement thereon said ring engaging said keys; resilient means tending to maintain said ring in a predetermined posit-ion on said driven member whereby the keys are maintained in'engagement with the driving member; and

means for arresting the movement of the ring while the driving member is turned, whereby the keys are Withdrawn from engagement with the driving member, permitting a relative movement between the driving and the driven members, thus causing compression of the coil spring withinthe recess of the driven member-by the parting of the lug from the bridging portion, saiddrivmg member having means for engagthe ring after a predetermined displacement of said driving member, whereby the coil spring within therecess of the driven memingthe means arresting the movement of her causes the same to overtake the driving I member and brings the bridging portion against the lug of, the driving member, said resilient means automatically restoring the ring to its normal position on said driven member and thus shifting the keys into engagement with the driving member.

' 18. In a magneto attachment, a driving member, a driven member, sliding keys car, ried by the driven member, openings in the driving member to receive said keys, projections on said keys, a ring carried on-the periphery of the driven member and having diagonally arranged slots to receive said key pro1ections, means for, arresting the movement' of said ring whereby the said keys are withdrawn from the openings in said driving member permitting it to move forward away from the ring and the driven member, means for releasing the ring after a predetermined displacement of the driving member and means carried within said members to cause the driven member to move rapidly forward to its normal position, and

ably carried by the driven member and adapted to control the movement said keys and driven member, means for arresting the movement of said ring whereby the keys are Withdrawn from engagement with the driving member permitting it to move forward away from the ring and driven member to compress said coil spring, by means of said lug, means for releasing the ring and driven member after a predetermined displacement of the driving member whereby the coil spring will move the driven member rapidly forward to its normal osition, and resilient means carried by the riven member to cause said ring to return to its normal position whereby said keys engage with the driving member for the purpose described.

20. In a magneto attachment,- a driving member; a driven member; automatic-coupling means unyieldingly connecting the drivingmember and the, driven member; means for uncoupling the driven member from the driving member and arresting its movement means for releasing said driven member after 'a predetermined displacement of the driving member; and means for causing' the driven member to overtake the driving member when the same is released.

21. In a magneto attachment, a driving members; means for uncoupling the driven member and arresting 1ts movement; means for releasing said driven member after a predetermined displacement of the driving member; and resilient means for causing the driven member to overtake the drivingmenn ber when the same is released.

22. A starting coupling for igniter magnetos comprising co-axial, relatively rotatable driving and driven members, a lock normally connecting said members to positively hold the same against relative rota tion, an actuating spring interposed between said members, a trip arranged to successively release said lock and arrest said driven member to thereby place said spring under tension and means for automatically shifting said trip to thereby release said driven member.

23. A starting couplingfor igniter magnetos comprising eo-axial, relatively rotary driving and drivenmembers having a cooperating lug and stop, a spring interposedv between said members, a springheld locking dog on said driven member and normally engaging said driving member to normally hold the same positively against relative rotation with said lug and stop in engagement, a shiftable trip arranged to successively release saidlock dog and arrest said driven member to thereby place said spring under tension, and a cam lug on said driving member for shifting" said trip to thereby release said driven member.

24. in a starting coupling for igniter mag netos, the combination with a magneto shaft and a stationary part, of co-axial, relatively rotatable driving and driven members for rotating said shaft, means positively connecting said members against relative rotation, an actuating spring interposed between said members for imparting an accelerated rotary movement to said driven member, and a trip'device mounted on said stationary part and arranged to successively release said positively connected members and arrest said driven member to thereby place said spring nuder tension, and means on said driving member for automatically shif ,ing said trip to thereby release said driven member and permit the accelerated rotation thereof by said actuating sprin".

25. The combination with a driven member, secured to the rotatable part of an elcctrio current generator, a driving member rotatably mounted thereon, and a spring set between so as to be tensioned by rotating thedriving member in advance of the driven member, of a coupling, device permanently engaging with the driven member, means for engaging a part of the couplingdevice forstopping its rotary motion 1 as Well as the rotary motion of the driven member; a driven member; automatic cou pling means unyieldably connecting the two member to tension said spring and means operated by the driving member when the driving member is rotated to a predetermined point in advance of the driven member for releasing the coupling device from said stopping means to allow said spring to impact its stored energy to the driven member and means for holding the coupling device in engagement with the driving memher while the generator is driven at or above its normal speed.

26. An impulse starting coupling for igniter magnetos comprising, a driving member, a driven member, means for holding said driven member from rotation during a partial rotation of said driving mem ber, a spring put under tension by the rotation of the driving member and non-rotation of the driven member, means for automatically releasing said driven member after a predetermined displacement of the driving" member, whercby said spring will cause the driven member to overtake the driving member, and means for coupling the driving and driven members unyieldingly together after said release has occurred.

27. An impulse startingcoupling for an electric current generator comprising, a driven member adapted to be fastened to the rotating part of the generator, a driving member rotatably mounted on the driven member, a device for coupling the driving and driven members together to prevent deviation in the timing of the generator with respect to the engine driving it during running thereof, means for] uncoupling the driving and driven members when the impulse coupling is brought into starting position whereby the driven member is held Y electric current driven member a a tedto be fastened to from rotation and the driving member is caused to advance ahead of it, a resilient.

member interposed between the drivingand driven members and adapted to be put under tension by the said advance of the driving member, means for automatically releasing the driven member at a predetermined point of rotation of the driving member whereby said resilient member causes the driven member to take a sudden impulse forward to produce an augumented flow of current from the generator for the purpose described.

28; An impulse starting coupling for an enera-tor" comprising, a

the rotating part 0 the generator, afidi'iw in-g member rotatably mounted on the driven member; coupling means carried on the driven member, for fastening the driving and driven members together to prevent deviation in the timing of the generator wlth respect to the engine driving it during running thereof, but adapted to be acted on for unfastening the driving and driven members when the impulse coupling is brought into starting position whereby the. driven member is held from rotation and the driv ing member is caused to edvance ahead of -it; a resilient member interposedbetween the driving and driven members and adapted to be'put under tension by the said nd ,vance of the driving member, means for automatically releasing the driven member at a predetermined pomt of-rota tion of the driving member whereby said resil ent member causes the driven member toiteke a sudden impulse forward to produce outingfor the urpose described;- and means associated with the coupling means ;.for' moving merited flow of current-from the generator" and holding the same into engagement with 

